Spatial CSIT Allocation Policies for Network MIMO Channels

@article{Kerret2014SpatialCA,
  title={Spatial CSIT Allocation Policies for Network MIMO Channels},
  author={Paul de Kerret and David Gesbert},
  journal={IEEE Transactions on Information Theory},
  year={2014},
  volume={60},
  pages={4158-4169}
}
In this paper, we study the problem of the optimal dissemination of channel state information (CSI) among K spatially distributed transmitters (TXs) jointly cooperating to serve K receivers. One of the particularities of this paper lies in the fact that the CSI is distributed in the sense that each TX obtains its own estimate of the global multiuser MIMO channel with no further exchange of information being allowed between the TXs. Although this is well suited to model the cooperation between… 

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References

SHOWING 1-10 OF 60 REFERENCES
CSI feedback allocation in multicell MIMO channels
In this work1, we consider the joint precoding across K transmitters (TXs), sharing the knowledge of the user's data symbols being transmitted to K single-antenna receivers (RXs). We consider a
Degrees of Freedom of the Network MIMO Channel With Distributed CSI
TLDR
A distributed channel state information (DCSI) model where each TX has its own local estimate of the overall multiuser MIMO channel and must make a precoding decision solely based on the available local CSI, and advocates the use of hierarchical quantization of the CSI.
Rate loss analysis of transmitter cooperation with distributed CSIT
TLDR
This work focuses on an extension of the conventional centralized CSI at the TX (CSIT) model, where instead of having a single channel estimate, or quantized version, perfectly shared by all the TX antennas, each TX receives its own estimate of the global multiuser channel.
Team decision for the cooperative MIMO channel with imperfect CSIT sharing
TLDR
This work considers the problem of joint MIMO precoding across multiple distant cooperating transmitters, and presents some solutions to theproblem of beamforming design in this case and illustrates the benefits in practical network scenarios.
Decentralized Precoding for Multicell MIMO Downlink
TLDR
This paper proposes distributed precoding techniques for the multicell MIMO downlink that are both decentralized with respect to the BSs as well as capable of enabling multiple users to share the same frequency carrier spatially within each cell.
CSI sharing strategies for transmitter cooperation in wireless networks
TLDR
This article addresses a "Who needs to know what?" problem when it comes to CSI at cooperating transmitters by suggesting that CSI overhead can be contained for even large networks provided the allocation of feedback to TXs is made non-uniform and to properly depend on the network's topology.
The Degree-of-Freedom Regions of MIMO Broadcast, Interference, and Cognitive Radio Channels With No CSIT
TLDR
Providing robust no-CSIT schemes that have the same DoF as their previously found CSIT counterparts and identifying situations where CSI feedback to transmitters would provide gains that are significant enough that even the DoF could be improved are identified.
Adaptive Limited Feedback for Sum-Rate Maximizing Beamforming in Cooperative Multicell Systems
TLDR
A new limited feedback strategy is proposed for multicell beamforming where cooperation is restricted to sharing only the CSI of active users among base stations, and a new feedback-bit allocation strategy, to partition the available bits between the desired and interfering channels, is developed.
On multicell cooperative transmission in backhaul-constrained cellular systems
TLDR
This paper considers the cellular downlink and provides a comprehensive summary and extension of previous and current work on multicell signal processing, and compares the performance obtained through centralized or decentralized optimization approaches, or through optimal or suboptimal calculation of precoding matrices, and identifies reasonable performance–complexity trade-offs.
Inner Bound on the GDOF of the K-User MIMO Gaussian Symmetric Interference Channel
TLDR
The K-user multiple input multiple output (MIMO) Gaussian symmetric interference channel where each transmitter has M antennas and each receiver has N antennas is studied from a generalized degrees of freedom (GDOF) perspective and the HK-scheme outperforms other schemes and is found to be GDOF optimal in many cases.
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